Heating device



Feb. 9, 1943. J. L. MOHUN HEATING DEVICE Filed spt. 1e, 1940 lI5 Sheets-Sheet 1 OQ 0G10 oo ooo o@ GOOD J. L. MOHUN HEATING DEVICE o ww um, J um. mm. @n mm A wm mm Ns NN mm QN su www@ ,IS

INVENTOR. `D/z/L L. MOM@ BY @zum laf Hrm/5.

Feb. 9, 1943. l 1 MQHUN 2,310,645

HEATING DEVICE y Filed sept. 1e, 1940 s sheets-sheet s mwmwfsff Patented Feb. 9, 1943 UNHTED STATES B'EEN' @ENCE HEATINGV DEVICE John L. Mohun, Chicago, lll.

Application September 16, 1940, Serial No. 357,014

(Cl. 18S-32) Claims.

My invention relates to heating devices and more particularly to devices which clean and humidify the heated air arising from an enclosed heat source within a roem, such as a convector, wit-hout seriously impeding the flow of air.

Many homes and offices employ convectors to transfer the heat from hot water or steam to the room air. These units are compact, occupying relatively little space, and as the name implies, operate largely by convection, rather than by combined convection and radiation as is the case with ordinary radiators. To operate properly these units should be surrounded by a shell ex* tending above the convector, which directs the course of the heated air and creates a draft in a manner somewhat similar to a chimney. By reason of this principle of operation these convectors cause the air to move with considerable velocity as compared to ordinary radiators, and so increase the amount of dust and dirt suspended in theY moving air, which is harmful not only to the occupants of the room but also to the furnishings.

Experiments have shown that the use of filters will not satisfactorily correct this condition, as iilters thick enough to remove the dust oifer a considerable resistance to the air and so decrease the efficiency of the convector unless mechanical means of drawing air through the unit are provided.

An object of my invention is, therefore, to provide an inexpensive device which will remove dust and dirt from the air passing through a heating device without greatly increasing the resistance to the air flow. K

Another object is to provide an vimproved humidifier particularly adapted for use in connection with enclosed convectors.

Another object is to provide an air cleaning device which may be easily installed in existing convector units, and which may be easily cleaned by ordinary means.

Another object is to provide a convector enclosure of improved and simplified design which will clean and humidify the air and control the proportions of fresh and recirculated air discharged into the room.

These, and other objects, will become apparent from the following descriptions and from the drawings in which Fig, 1 is a partially sectioned front elevation of one form of my device;

Fig. 2 is a vertical sectional view taken along the line 2-2 of Fig. l;

Fig. 3 is a horizontal sectional view taken along the line 3--3 of Fig. 1;

Fig. 4 is a vertical sectional view of ya modified form of my device adapted for ready removal or insertion in existing convector enclosures;

Fig. 5 is a horizontal sectional view taken along the line 5-5 of Fig. 4;

Fig. 6 is a perspective view of the removable portion of my device shown in section in Fig. 4;

Fig. '7 is a front elevation of another modification of my device having means of mixing and cleaning fresh and recirculated air;

Fig. 8 is a vertical sectional view taken along the line 8 8 of Fig. '7; and

Fig. 9 is a vertical sectional View taken along the line 9 9 of Fig. '7.

Referring to Fig. 1 my device comprises a shell generally designated H, a convector I2,1a humidier I3, and scrubbers I 4 arranged within the shell il above the convector l2. The shell ll is a rectangular box-like structure fitting over the convector l2, which is supported above the iioor in any convenient manner, as by a hanger I6 attached to the ,adjacent wall. The height of the shell is variable but will ordinarily extend upwardly approximately to the level of the window stool or slightly below, the enclosed space above the convector ordinarily being vacant. The shell li is provided with a removable front panel I'I which carries the humidifier I3 and has an air outlet IS in its upper portion covered with a grill 2B.

The lower edge of the removable panel I1 is provided with a plurality of projections I9 which cooperate with flange-like receivers 2| to retain the lower edge of the panel in the plane of the front of the shell il. The projections i9 are formed of metal strips, one end of which is attached adjacent to the lower edge of the removable panel ll. The strips are bent inwardly and downwardly forming lower legs parallel to the upper legs and extending below the lower edge of the panel. The receivers 2l are angle sections, one leg of which is attached to the inner wall of the shell il slightly above the top of the convector I2. The upper legs of the receivers are substantially horizontal and extend inwardly from the shell. Openings are formed in the horizontal legs to receive the lower legs of the corresponding projections l9. The removable panel l1 is also provided with spring clips 22 which cooperate with the sides or top of the shell Il to retain the removable panel I7 in place. The panel l'i may be removed by drawing the upper portion thereof outwardly to disengage the spring clips 22 and then lifting the entire panel, which will disengage the projections I9 from the receivers 2|, permitting access to the interior of the convector.

The humidifier I3 comprises a container 23, fins 24, a lling opening 26, and a discharge opening 21. The opening 21 is formed in the removable panel I1 below the air outlet I8, the lower edge being curved inwardly and upwardly, forming a flange member 25. The container 23 resembles a shallow trough, attached along its edges to the outer surface of the panel I1, the upper edge of the container being above the opening 21. As it is essential that the joint between the container 23 and the panel I1 be water-tight, I prefer to attach the container. to the panel by welding, although other suitable methods may be employed. A small openingr 26 is provided in the upper portion of the container 23 through which water may be added. The inner surface of the panel I1 is provided with vertical inwardly extending parallel fins 24 adapted to rapidly transfer the heat from the warm air within the shell to the water in the container 23. l

Scrubbers I4 are situated within the shell II in such manner that practically all of the air passing through the shell will come in contact with the surfaces of these scrubbers. The scrubbers consist of a rigid inner panel 28 covered on both sides with a loosely woven hairy feltlike material 29 having an irregular surface. Both the rigid panel 28 and the covering material 29 may be perforated, providing a multiplicity of relatively small openings extending through the scrubbers.

'Iwo of these scrubbers will ordinarily be sufcient to adequately clean the air, the lower scrubber preferably extending inwardly and downwardly from the `outer wall of the shell II adjacent to, but not in contact with, the convector I2. The width of this scrubber is less than the Width of the shell, thereby permitting the unobstructed passage of air between the end of the scrubber and the inner wall of the shell. The upper edge of the upper scrubber is preferably located adjacent to the humidifier fins and below the air outlet, but the scrubber does not extend over the top of the fins 24. The upper scrubber extends outwardly and downwardly in a direction opposite to the lower scrubber, and is narrower than the shell so that air may pass freely through the end of the scrubber and the outer wall of the shell. One of the principal purposes in providing scrubbers arranged in this manner is to direct the air rising from the convector against as many scrubbing` surfaces as possible without seriously increasing the resistance offered to the passage of air. My device will also function if the slope of the scrubbers is varied or if they are horizontal, but for reasons hereafter explained, the arrangement shown is preferred.

The scrubbers are retained in position by supports 3| having an L shaped cross-section. One leg of each supportI is attached to one side of the shell in suitable position. The other legs of the support 3| extend inwardly and form an inclined shelf on which the scrubbers rest. Rivets or bolts may extend through this leg and through the rigid panel 28 to attach the scrubbers to the supports or a projection may be formed on the lower end of each support to prevent movementfof the scrubbers. The supports are, of course, provided upon each end of the shell and are parallel to each other. It is not essential, however, that these supports be attached to the sides of the shell II as shown, for other methods of attachment are equally suitable. For example, the supports for one or more of the scrubbers may be affixed to the removable panel I1, or to the back of the shell II by modifying the supports in an obvious manner.

A deilector 32 is provided in the upper portion of the shell and may comprise a sheet of metal 33 extending from the innermost upper corner of the shell II downwardly and outwardly to the outer wall of the shell II in suc-h manner as to deflect the air through the opening I8. This deflector 33 may be supported in a manner similar to that described in connection with the scrubbers I4.

The inner shell Wall and sides, as well as the inner surface of the deector and the lower portion of the removable panel I1, are covered with a layer of loosely woven hairy felt-like material 29 similar to that used to cover the scrubbers I4. This material may be attached in any desired manner as by riveting, stitching, glueing, or stapling, or if desired, may be removably attached by the use of spring clips or snap button fasteners.

The loosely woven hairy felt-like material 29 is commercially available under the trade name of Ozite and differs from ordinary felt in that not all of the fibers forming the material are parallel to the plane of the material. It also has a design impressed upon its surface in relief making the surface irregular and allowing certain of the fibers to extend outwardly at an angle to the plane of the material. Strength sufficient for handling is obtained by providing an intermediate layer of loosely woven burlap or similar material. When this material is perforated it may be observed that it is practically impossible to obtain a perfectly clean cut, as the ends of the fibers or hairs comprising the material are deformed and after perforation will extend into the opening, forming a surface which is highly efcient in removing dust from the air.

The operation of my device is apparent from the foregoing description, as it will be seen that air heated by the convector I2 will rise upwardly through the enclosure and be discharged through the opening I3. During its passage through the enclosure it will be brought into intimate contact with the hairy felt-like material on the scrubbers and on the sides of the enclosure and will deposit thereon its charge of dust and dirt. Portions of the rising column of air will also pass through the openings 3B in the scrubbers I4. These openings greatly reduce the resistance offered by the scrubbers to the passage of air, and in addition serve to more thoroughly clean the air passing through them as the edges of the openings present a surface which is more highly effective in removing dust and dirt from the air than is the surface presented by the material itself.

The column of air rising from the convector I2 will also pass upwardly between the fins 24 and past flange 25, drawing the Water vapor within the container outwardly through the opening 21. As the upper scrubber slopes outwardly and downwardly from the upper edge of the ns 24 it aids in directing a large portion of the air between the humidifier fins, thereby increasing the efficiency of the humidier. The fins 24, having a large surface area, will be quickly heated by the air and will transfer this heat to the water in the container 23 by conduction.

Periodic cleaning of the scrubbing surfacesV within the enclosure is, of course, necessary for when they 'have become sufficiently coated with dust and dirt their scrubbing efliciency is greatly reduced. Replacement of these surfaces is, however, unnecessary as the front panel l1 may be removed and the surfaces cleaned with an ordinary vacuum cleaner. 'I'his will remove substantially all of the dust and dirt deposited thereon and restores the scrubbing surfaces to their original eiciency.

With the type of construction above employed it is incidental whether or not the enclosure eX- tends into the room or whether it is partially surrounded by the wall of the building, the latter type being known as a recessed convector, for in either case the interior of the enclosure is accessible through the removable front panel I1. It should be noted that the hairy felt-like material 29 does not extend around or over the fins 24 as the felt-like material is an insulator and would largely counteract the benefits obtained through the use of the iins.

The insulating qualities of the felt-like material, when disposed according to my invention, serve to increase the efliciency of the heating unit as the material 29, disposed along the rear or outermost wall of the shell, prevents the transfer of heat outwardly to the wall of the room. This is particularly important in instances where the unit is recessed into the wall, for unless the wall is specifically constructed contrary to customary practice the heating unit will occupy the stud space necessitating the elimination of insulation from this area. It is clear therefore, that in ordinary devices having no insulation on the rear or outermost wall the large temperature diierential between the shell and building wall will result in excessive heat loss thereby largely ccunteracting the benefits ordinarily obtained by the use of convection heaters.

The material attached to the iront and side walls within the unit also increases the eiiiciency as it substantially reduces the transfer of heat by conduction or radiation, or in other words, the heat units normally dissipated in this manner are no longer lost in an ineffective manner but are taken up by the air passing through the unit. This not only creates a stronger current through the device but also increases the available comfortable space within a room, for furniture and other articles which would normally be kept at a distance due to the excessive heat radiating from ordinary devices may be disposed closer to my device with less danger of overheating.

My invention may be easily adapted to existing enclosures by a modification of my device illustrated in Figs. 4, 5, and 6 which comprises essentially a frame, generally designated 34 carrying scrubbers, and adapted to be inserted in the normally vacant space above the convector within the shell. The subsequently described structure is shown as being applied to a specific type of convector enclosure or shell but it is to be understood that this modincation is equally adaptable to other types of enclosures. Referring to Fig. 4 the unit comprises a convector 35, a shell generally designated 31, a removable frame generally designated 34 carrying scrubbers 38, and a deflector 39. The general appearance of the shell 31 is similar to that described in connection with Fig. 2, but in this modification the front panel is not removable. The humidier I3 is also similar to that described in connection with Fig. 2.

The front section of the shell 31 is attached; at each vertical edge to vertical strips of angle iron 4l, which are in turn connected by laterally extending reinforcements, not shown, to the inner wall of the shell, the strips 4| acting as frame reinforcements. At least one side of the enclosure, designated 42, is attached to the inner wall of the shell by a hinge 43 and may be retained in its enclosed position by a spring clip 44, attached to one edge of the side 42 and cooperating with an angle iron support 4 l The removable frame, generally designated 34, comprises a panel 46 of light gauge metalmaintained in a vertical position parallel to the rear wallof the shell 31 by supports, generally designated 41. -The upper portion of the panel 43 may be bent inwardly at an angle to form a deflector 39.

The support members 41 may be formed from a relatively light gauge metal formed into a channel section, and comprise a Vertical leg 48 and an inwardly extending' upper leg 49, the angle between the upper and lower legs being such that the deector 39 will be supported by the upper leg 4g in its proper position. The supports 41 extend beyond the lower edge of the vertical panel 46, and are bent inwardly to form legs 5l adapted to rest upon the upper surface of the convector 36. Portions 52 of these lower legs 5l also extend downwardly and engage the side of the convector 36 to prevent inward movement of the base of the frame, 34.

The deector 39 extends outwardly and downwardly from the upper inner corner of the shell 31 to the vertical panel 46 and may be attached to the support members 41 by rivets 5@ orV by other suitable means. 'Ihe scrubbers 38 are also supported within the enclosure by the support members 41, the positions of these scrubbers, relative to the convector' and shell, being substantially identical with that described in connection with the scrubbers in Fig. 2, but in this modication are supported by U shaped members 53 attached to thel support members 41 by rivets 54. The scrubbers 3B rest upon the inwardly extending arms of the U shaped support members 53 and may be held in place by crimping the ends of the arms over the end of the scrubbers or by riveting orl other suitable means. The scrubbers consist of a panel 56 of rigid material covered on both sides with a layer of loosely woven hairy felt-like material 51 having an irregular surface andv preferably provided with perforations 58 to decrease the resistance to the flow of air. The. inner side of the deflector 39 and of the panel 45 are also covered with a layer of similar material.

The operation of my device is similar to that previously described. This modification is, however, adaptable for installation in existing units and may be easily removed for cleaning by opening the hinged side 42 and sliding the removable frame 34, carrying the deflecto-r 39 and the scrubbers 38, outwardly. It is, of course, obvious that the removable frame can also be inserted in an enclosure of the type illustrated in Fig. 2 in which the front panel is removable. It is not, however, necessary to remove the frame 34 for cleaning, as access may be had through the hinged side 42.

The. support members 41, as well as the lightV It is often'desirable to provide means of introducing fresh air into a. room through a convector. This may be accomplished by an apparatus such as that illustrated in Figs. '1, 8, and 9, which is adaptable for use in circumstances where the convector is located below a window. The unit consists principally of a convector 59, a shell, generally designated 6|, a fresh air conduit (i2 communicating with the lower portions of the convector shell, a humidifier I3, and a scrubber 63. The shell 6| is a rectangular boxlike structure telescoped over a convector 59, which is supported above the floor in any convenient manner as by legs 64. The front panel of the shell SI has a room air inlet 66 below the convector 59, and has an air outlet 6l' in its upper portion. If desired, the air outlet may be provided with an adjustable diffuser, 68.

A shell 6| is provided with a hinged top 69 which may suitably be approximately level with the window stool, A hollow back wall 7| extends upwardly from below the co'nvector to a point' well above the window stool and forms one side of the fresh air conduit G2. This hollow wall is filled with an insulating material 72, such as insulating board, to prevent the transfer of the heat from the convector enclosure to the fresh air conduit. The back wall 1| is bent outwardly ata point above the window stool forming an upper side or top 'i3 of the fresh air inlet. This top extends outwardly beyond the plane of the window sash and has a gasket 'l5 attached to its upper surface upon which the lower sash rail 14 of the window rests. A channel shaped member 16 rests upon the sill of the window and defines, in conjunction with side members, not shown, a receiver for a removable cartridge type filter 11. A wall plate T3 extends inwardly from the frame member 'l to the edge of the window stool and downwardly therefrom to a point below the convector 59. An upwardly extending flange 19 is formed on the wall plate 18 inwardly from the filter and cooperates with a check valve 8| to control the passage of air through the fresh air conduit 62. The check valve 8| is hingedly attached to the top 13 of the fresh air inlet and is operatively connected to an external handle 82. Movement of the check valve will, of course, cause the ends of the handle to describe a limited arc. Spring clips 83 are attached to the side of the shell and are adapted to engage the handle 82 of the check valve 8| at the outer limits of the arc to retain the check valve in a fully opened or fully closed position. The sides of the shell 6| may extend upwardly above the hinged top 69 forming the sides of the fresh air conduit 62, and may also extend inwardly to the wall piece 18, completing the enclosure.

A damper 84 is attached to a rod 86 which is journaled in the sides of the shell 6| below the convector 59 between the back wall 7| and the front panel of the shell 6|. One end of the rod 86 extends through a side of the shell and is bent to form a handle 81 by means of which the position of the damper 34 may be adjusted, the handle being in frictional engagement with the side of the shell. The damper 84 is adapted to swing between the back wall and the front panel of the shell 6|, thereby controlling the amounts of fresh and room air drawn upwardly through the convector 59.

A deflector 88 is provided within the shell extending from the upper inner edge of the shell 6| downwardly and outwardly to the back wall 1|, the upper edge of the deflector being above the air outlet 61.

The scrubber 63 comprises a rigid inner panel 89 having horizontal c'orrugations formed therein and a covering of loosely woven hairy felt-like material 9|. The upper edge of the rigid inner panel is bent around a horizontal bar 92, the ends of which extend upwardly substantially parallel and adjacent to the sides of the shell 6|, forming legs 93. The upper ends of the legs 93 are pivotally attached to pins 94 which extend through the sides of the shell 6| and support the scrubber. If desired mechanical means such as a fan 95 and motor 95 may be provided to force air through the unit. The motor 96 should be mounted above the deflector 88 to prevent interference with the passage of air through the unit. A humidifier I3, similar to that previously described, is attached to the front panel of the shell 6|.

The deflector 88, the inner side of the back wall '1| below the deector, the sides of the shell 6|, and the portion of the front panel of the shell 6| lying below the humidifier fins S1 are covered with a loosely woven hairy felt-like material 98 similar to that used to cover the scrubber 63. The covering 98, as well as the scrubber 63, terminate above the convector 59 and are not in contact therewith.

It should be noted that the felt-like material, While similar to that previously described, is applied to the unit in a somewhat different manner and is, in this case, preferably attached by rivets or similar means in such manner that the material will form irregular plaits or folds along the inner surfaces, which increases the effective area of the scrubbing surfaces.

The operation of this device is, in many respects, similar to that previously described. Fresh air may enter through the filter 'I1 when the check valve 8| and the damper 84 are open. The fresh air, being cool, will tend to sink to the bottom of the fresh air conduit 62, and this tendency will not be counteracted by heat from the convector, as the transfer of heat to the fresh air is prevented by the insulation 'l2 in the hollow back wall 1|. Upon reaching the bottom of the enclosure the fresh air will be drawn upwardly together with room air which enters the enclosure through the room air inlet 65, through the convector 59, and will be discharged through the air outlet 68. Obviously, the amounts of fresh and room air admitted to the unit may be controlled by the damper 84 and the check valve 8|. As the air passes upwardly it comes in intimate contact with the surface of the scrubber and the felt-like material attached to the walls of the enclosure, where it will deposit the entrained dust or dirt. As previously mentioned, the fan 95 and the motor 96 are not, in all cases, essential, but may be used if desired on this or other modifications of my device.

Under certain conditions it has been found that the heated room air may be drawn out of the room through the air inlet, as for example, when a strong wind is blowing from the other side of the building, causing a partial vacuum on the lee wall, or when an actual static pressure has been built up within the room. This action mair be prevented by disengaging the handle 82 of the check valve 8| from the spring clips 83, allowing the check valve 8| to swing freely. The relatively slight pressure exerted by the incoming fresh air will ordinarily be sufiicient to swing the check valve 8| to an open position, and allow the fresh air to pass downwardly through the fresh air conduit 62 into the unit. If, however, the pressure should be reversed and the air starts to flow in the opposite direction the check valve 8i will swing shut against the flange 7S, eiectively preventing the loss `of heated air. This operation of the check valve is, of course, prevented by holding the valve in a completely open or completely shut position by means of spring clips 83. As the air pressures involved are very slight the check valve 8l should be formed of a light metal such as aluminum, and covered on its outer face with a layer of hairy felt-like material to scrub the incoming air. Proper balance may be obtained by adjusting the position and weight of the handle 82, the adjustment being such that the valve remains closed at zero pressure.

It is, of course, obvious that many modifications may be made in the specific embodiments previously described with reference to Fig. 2, for example, the lower scrubber may be attached to the removable front panel i7, rather than to the rear wall of the shell, so that both scrubber-s will be removed with the front panel or both scrubbers may be attached to the rear wall. Furthermore, any one of the units herein described may be connected to a fresh air outlet such as that shown in Fig. 8 in an vobvious manner, or if desired, the fresh air inlet may comprise an opening through the building wall in a suitable location.

The foregoing detailed description has been made in compliance with section 4888 of the Revised Statutes, but as modications may be made without departing from the scope and spirit of my invention I do not wish to be limited except by the scope of the appended claims.

I claim:

1. In a heating device comprising a convector and a shell of substantial height telescoped over the convector and having an air outlet in the shell above the convector, a humidiiier associated with the outer wall oi the shell above the convector having vertical parallel heat transfer iins extending into the shell and a baffle within the shell above the convector, said baille sloping up towards said ns, and having a surface formed of dirt absorbing material'.

2. In an air heating and cleaning device ccmprising a convector, and a shell telescoped over the convector and having an air inlet below the convector and an air outlet above the convector, a hurnidier associated with the shell and having ns extending inwardly into the path of the air and an external container, the container having a wall associated with the fins and communicating with the interior of the shell, a baille within the shell above the convector and sloping up towards said fins, an-d a layer of hairy feltlike material covering the baille and substantially all of the inner surfaces of the shell above the convector to provide scrubbing surfaces.

3. In an air heating and cleaning device, a convector, a shell telescoped over said convector, an external water container on said shell having an opening communicating with the interior of said shell, vertical ns attached to the inner wall of said container in parallel relation below said opening, and a sloping scrubber having its upper edge adjacent the upper end of said ns whereby a large portion of the heated air rising from the convector is directed against said ns.

4. In an air heating and cleaning device, a convector, a shell telescoped over said convector, an L-shaped support within said shell, one leg of said support resting on the convector and the other leg being substantially parallel to a wall of the shell, angularly disposed varms attached to said support, and scrubbing means attached to said arms, said scrubbing means comprising a panel of air impervious material extending angularly into the path of air rising from the convector and covered with a dry feltflike material adapted to remove dust from the air 'by con-tact, sai-d shell having normally closed openings through which the support, arms and scrubbers may be removed as a unit.

5. In a heating device, a convector, a shell of substantial height telescoped over the .convector having an air inlet and an air outlet and a humidifier, said humidier comprising a container, solid metal fins integral with one wall of the container extending into the shell above the convector, the container being attached to the outer surface of the shell but in communication with the air within the shell, and means covered with felt-,like material for directing air flowing across sai-d convector onto said ns.

6. In a heating device, a convector, a shell having an air outlet telescoped over the c011- vector, and a humidifier associated with a wall of the shell below the air outlet but above the convector, said humidifier comprising a con,- tainer adapted to hold Water attached .to the puter surface ,of the shell communicating with the interior of the shell through a vapor dise charge opening formed therein, a flange on the bottom edge of the opening extending upwardly and inwardly for directing air flowing across said convector around said vapor discharge opening for entraining vapor from said humidifier, and parallel vertical ns associated with the container extending into the shell, the upper edges of the fins being below but adjacent to the flange.

7. In an air cleaning and heating device, comprising a convector and a shell telescoped over said convector, a removable frame within the shell above the convector, and a plurality of air scrubbing means fixed to said frame, said frame comprising a back plate, a top plate extending upwardly and forwardly to form a deflector, means for securing said air scrubbing means to the front face of said back plate below said deflector plate, said shell having a normally closed opening through which the frame and scrubbing means may be removed as a unit.

8. An air heating and humidifying device comprising a convector, a shell enclosing and extending a substantial distance above said convector, said shell having a flat upright wall portion above said convector and having an air inlet opening below said convector and an air outlet opening above said wall portion, and a box-like member having a side Wall, two end walls, a bottom and a top, the edges of said end walls and said bottom being fixed to said wall portion whereby said box-like member and said Wall portion cooperate to form a water receptacle, the top of said box-like member having a small opening therein for the insertion of water into said receptacle, and said wall portion having a large opening therein immediately below the top of said box-like member for the free escape of water vapor from said receptacle into said shell, and a small deflector lip extending inwardly and upwardly from the lower marginal edge of said last-named opening for deilecting air around said last-named opening for entraining vapor from said receptacle.

9. In a device of the class described, a convector, a shell of substantial height having front and rear walls telescoped over the convector, the front wall of said shell having a discharge opening adjacent its upper end and above said convector, an air deector extending from immediately above said discharge opening downwardly and rearwardly to the back wall of said shell, a humidifier mounted on the front of said front wall and having a filling opening in its top walll the front Wall of said shell being provided with a vapor discharge opening opposite the upper portion of said humidifier, the lower marginal edge of said opening being curved inwardly and upwardly for deiecting air owing through said shell around said vapor discharge opening for entraining the vapor from said humidifier, vertically arranged heat-conducting fins secured to the rear side of said front wall opposite said humidifier and extending rear- Wardly therefrom, means for directing air passing across said convector onto said ns and for creating a turbulence in said air, and felt-like material secured to the inner surfaces of the front and back walls of said shell and to said means and to the under side of said deflector for scrubbing air passing through said shell and for heat insulating said shell.

10. An air cleaning device for use in an air heating and scrubbing construction having a convector, a shell extending above said convector having 'a discharge opening in the front wall at the upper end thereof and having a humidifier on said front wall provided with a heat conducting portion, said device comprising a panel having an upright portion adapted to t against the back of said shell and a sloping top portion at the top of said upright portion and adapted to extend across the upper portion of said shell to the front of said shell above said opening, a plurality of bale members carried by said panel, one of said baille members being contiguous to and extending forwardly from said upright portion, an adjacent one of said baille members spaced from said upright portion and extending forwardly therefrom and so constructed and arranged that when in use will deect air passing upwardly from said convector onto said conducting surface for heating said humidier, and a covering of dry felt-like dust collecting material for said bale members and the front of said panel, said bafle members being provided with a plurality of openings therethrough whereby a portion of the air moving upwardly from said convector will pass through said baille members and felt-like material thereon, respectively, and the remaining portions will flow around said bales in contact with said felt-like material thereon for removing dust from said air.

JOHN L. MOHUN. 

